I've tried to get the answer for this actually 10 times now, plzzz help: write a formula that represents the number of people in the nth row (pre-calc problem, I only need the formula)

Consider the integral: 4 0 16 − y2 − 16 − y2 4 1 x2 + y2 dz dx dy . (a) describe w. use the standard view of the x, y, and z axes. front half of a cone with a rounded top. full cone with a flat top. right half of a cone with a flat top. front half of a cone with a flat top. right half of a cone with a rounded top.

100 points, hi, i’m not sure what to do here,the data doesn’t seem to be quadratic .? can anyone me, in advance

What is the 12th term of b(n)=-4-2(n-1)